package com.gilight.base.util;

import org.apache.commons.lang3.StringUtils;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipUtil {

	public static void generateZip(String path, List<File> files,List<String>displayNames) throws Exception {
		ZipOutputStream out = new ZipOutputStream( new FileOutputStream(path));
		try {
			byte[] buffer = new byte[1024];
			int i = 0 ;
			for (File file : files) {
				if(!file.exists()){
					continue;
				}
				FileInputStream fis = new FileInputStream(file);
				out.putNextEntry(new ZipEntry(displayNames.get(i)));
				int len;
				while ((len = fis.read(buffer)) != -1) {
					out.write(buffer, 0, len);
				}
				i++;
				out.flush();
				out.closeEntry();
				fis.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (out != null) {
				out.close();
			}
		}
	}

	public static String generateZip(String root, List<Map<String,Object>> files) throws Exception {
		String path = root+ UUID.randomUUID().toString()+".zip";
		ZipOutputStream out = new ZipOutputStream( new FileOutputStream(path));
		try {
			byte[] buffer = new byte[1024];
			int i = 0 ;
			for (Map<String,Object> file : files) {
//				if(!file.exists()){
//					continue;
//				}
				File f = new File(root+"/"+(String) file.get("newFileName"));
				if(!f.exists()){
					continue;
				}
				FileInputStream fis = new FileInputStream(f);
				//文件名重复 不中断继续压缩
				try{
					out.putNextEntry(new ZipEntry((String) file.get("oldFileName")));
					int len;
					while ((len = fis.read(buffer)) != -1) {
						out.write(buffer, 0, len);
					}
					i++;
					out.flush();
					out.closeEntry();
					fis.close();
				}catch (Exception e){
					e.getStackTrace();
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (out != null) {
				out.close();
			}
		}
		return path;
	}

	public static String generateZip(String root, String zipRoot, List<Map<String,Object>> files, String zipName) throws Exception {
		File dict = new File(zipRoot);
		if (!dict.exists() || !dict.isDirectory()) {
			dict.mkdirs();
		}
		if (StringUtils.isEmpty(zipName)) {
			zipName = UUID.randomUUID().toString()+".zip";
		}
		String path = zipRoot+ "/"+zipName;
		ZipOutputStream out = new ZipOutputStream( new FileOutputStream(path));
		try {
			byte[] buffer = new byte[1024];
			for (Map<String,Object> file : files) {
//				if(!file.exists()){
//					continue;
//				}
				File f = new File(root+"/"+(String) file.get("newFileName"));
				if(!f.exists()){
					continue;
				}
				FileInputStream fis = new FileInputStream(f);
				//文件名重复 不中断继续压缩
				try{
					out.putNextEntry(new ZipEntry((String) file.get("oldFileName")));
					int len;
					while ((len = fis.read(buffer)) != -1) {
						out.write(buffer, 0, len);
					}
					out.flush();
					out.closeEntry();
					fis.close();
				}catch (Exception e){
					e.getStackTrace();
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (out != null) {
				out.close();
			}
		}
		return path;
	}

	public static void zipMultiFile(String filepath ,String zippath, boolean dirFlag) {
		try {
			File file = new File(filepath);// 要被压缩的文件夹
			File zipFile = new File(zippath);
			ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFile));
			if(file.isDirectory()){
				File[] files = file.listFiles();
				for(File fileSec:files){
					if(dirFlag){
						recursionZip(zipOut, fileSec, file.getName() + File.separator);
					}else{
						recursionZip(zipOut, fileSec, "");
					}
				}
			}
			zipOut.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private static void recursionZip(ZipOutputStream zipOut, File file, String baseDir) throws Exception{
		if(file.isDirectory()){
			File[] files = file.listFiles();
			for(File fileSec:files){
				recursionZip(zipOut, fileSec, baseDir + file.getName() + File.separator);
			}
		}else{
			byte[] buf = new byte[1024];
			InputStream input = new FileInputStream(file);
			zipOut.putNextEntry(new ZipEntry(baseDir + file.getName()));
			int len;
			while((len = input.read(buf)) != -1){
				zipOut.write(buf, 0, len);
			}
			input.close();
		}
	}
	private static final int BUFFER_SIZE = 2 * 1024;
	/**
	 * 压缩成ZIP 方法1
	 * @param srcDir 压缩文件夹路径
	 * @param out 压缩文件输出流
	 * @param KeepDirStructure 是否保留原来的目录结构,true:保留目录结构;
	 * false:所有文件跑到压缩包根目录下(注意：不保留目录结构可能会出现同名文件,会压缩失败)
	 * @throws RuntimeException 压缩失败会抛出运行时异常
	 */
	public static void toZip(String srcDir, OutputStream out, boolean KeepDirStructure)
			throws RuntimeException{
		long start = System.currentTimeMillis();
		ZipOutputStream zos = null ;
		try {
			zos = new ZipOutputStream(out);
			File sourceFile = new File(srcDir);
			compress(sourceFile,zos,sourceFile.getName(),KeepDirStructure);
			long end = System.currentTimeMillis();
			System.out.println("压缩完成，耗时：" + (end - start) +" ms");
		} catch (Exception e) {
			throw new RuntimeException("zip error from ZipUtils",e);
		}finally{
			if(zos != null){
				try {
					zos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
	/**
	 * 压缩成ZIP 方法2
	 * @param srcFiles 需要压缩的文件列表
	 * @param out 压缩文件输出流
	 * @throws RuntimeException 压缩失败会抛出运行时异常
	 */
	public static void toZip(List<File> srcFiles , OutputStream out)throws RuntimeException {
		long start = System.currentTimeMillis();
		ZipOutputStream zos = null ;
		try {
			zos = new ZipOutputStream(out);
			for (File srcFile : srcFiles) {
				byte[] buf = new byte[BUFFER_SIZE];
				zos.putNextEntry(new ZipEntry(srcFile.getName()));
				int len;
				FileInputStream in = new FileInputStream(srcFile);
				while ((len = in.read(buf)) != -1){
					zos.write(buf, 0, len);
				}
				zos.closeEntry();
				in.close();
			}
			long end = System.currentTimeMillis();
			System.out.println("压缩完成，耗时：" + (end - start) +" ms");
		} catch (Exception e) {
			throw new RuntimeException("zip error from ZipUtils",e);
		}finally{
			if(zos != null){
				try {
					zos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
	/**
	 * 递归压缩方法
	 * @param sourceFile 源文件
	 * @param zos zip输出流
	 * @param name 压缩后的名称
	 * @param KeepDirStructure 是否保留原来的目录结构,true:保留目录结构;
	 * false:所有文件跑到压缩包根目录下(注意：不保留目录结构可能会出现同名文件,会压缩失败)
	 * @throws Exception
	 */
	public static void compress(File sourceFile, ZipOutputStream zos, String name,
								boolean KeepDirStructure) throws Exception{
		byte[] buf = new byte[BUFFER_SIZE];
		if(sourceFile.isFile()){
// 向zip输出流中添加一个zip实体，构造器中name为zip实体的文件的名字
			zos.putNextEntry(new ZipEntry(name));
// copy文件到zip输出流中
			int len;
			FileInputStream in = new FileInputStream(sourceFile);
			while ((len = in.read(buf)) != -1){
				zos.write(buf, 0, len);
			}
// Complete the entry
			zos.closeEntry();
			in.close();
		} else {
			File[] listFiles = sourceFile.listFiles();
			if(listFiles == null || listFiles.length == 0){
// 需要保留原来的文件结构时,需要对空文件夹进行处理
				if(KeepDirStructure){
// 空文件夹的处理
					zos.putNextEntry(new ZipEntry(name + "/"));
// 没有文件，不需要文件的copy
					zos.closeEntry();
				}
			}else {
				for (File file : listFiles) {
// 判断是否需要保留原来的文件结构
					if (KeepDirStructure) {
// 注意：file.getName()前面需要带上父文件夹的名字加一斜杠,
// 不然最后压缩包中就不能保留原来的文件结构,即：所有文件都跑到压缩包根目录下了
						compress(file, zos, name + "/" + file.getName(),KeepDirStructure);
					} else {
						compress(file, zos, file.getName(),KeepDirStructure);
					}
				}
			}
		}
	}


	public static void toZip(String[] srcDir, String outDir,
							 boolean KeepDirStructure) throws RuntimeException, Exception {

		OutputStream out = new FileOutputStream(new File(outDir));

		long start = System.currentTimeMillis();
		ZipOutputStream zos = null;
		try {
			zos = new ZipOutputStream(out);
			List<File> sourceFileList = new ArrayList<File>();
			for (String dir : srcDir) {
				File sourceFile = new File(dir);
				sourceFileList.add(sourceFile);
			}
			compress(sourceFileList, zos, KeepDirStructure);
			long end = System.currentTimeMillis();
			System.out.println("压缩完成，耗时：" + (end - start) + " ms");
		} catch (Exception e) {
			throw new RuntimeException("zip error from ZipUtils", e);
		} finally {
			if (zos != null) {
				try {
					zos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}

	}

	private static void compress(List<File> sourceFileList,
								 ZipOutputStream zos, boolean KeepDirStructure) throws Exception {
		byte[] buf = new byte[BUFFER_SIZE];
		for (File sourceFile : sourceFileList) {
			String name = sourceFile.getName();
			if (sourceFile.isFile()) {
				zos.putNextEntry(new ZipEntry(name));
				int len;
				FileInputStream in = new FileInputStream(sourceFile);
				while ((len = in.read(buf)) != -1) {
					zos.write(buf, 0, len);
				}
				zos.closeEntry();
				in.close();
			} else {
				File[] listFiles = sourceFile.listFiles();
				if (listFiles == null || listFiles.length == 0) {
					if (KeepDirStructure) {
						zos.putNextEntry(new ZipEntry(name + "/"));
						zos.closeEntry();
					}

				} else {
					for (File file : listFiles) {
						if (KeepDirStructure) {
							compress(file, zos, name + "/" + file.getName(),
									KeepDirStructure);
						} else {
							compress(file, zos, file.getName(),
									KeepDirStructure);
						}

					}
				}
			}
		}
	}

	public static void main(String[] args) throws Exception {
/** 测试压缩方法1 */
		FileOutputStream fos1 = new FileOutputStream(new File("d:/mytest01.zip"));
		ZipUtil.toZip("D:\\upload\\da41f76189b14cd79fa6d4bc736cda611536289976627", fos1,true);
	}

}
